diff --git a/meshmode/dof_array.py b/meshmode/dof_array.py
index 0bba5971a6f1fdfd216367ae93b09721e5ec0f9c..1f1a1692ea35e9cab1edd020171acbd53c13e6c9 100644
--- a/meshmode/dof_array.py
+++ b/meshmode/dof_array.py
@@ -79,7 +79,7 @@ class DOFArray(np.ndarray):
     def __array_finalize__(self, obj):
         if obj is None:
             return
-        self.array_context = getattr(obj, 'array_context', None)
+        self.array_context = getattr(obj, "array_context", None)
 
     @property
     def entry_dtype(self):